Pressure-induced structural and vibrational evolution in ferroelectric RInO3 (R=Eu, Gd, Dy)
Pressure-induced structural and vibrational evolution in ferroelectric RInO3 (R=Eu, Gd, Dy)
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铁电 RInO3 (R=Eu、Gd、Dy) 中压力引起的结构和振动演化
DOI：
10.1016/j.ssc.2013.09.006
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发表时间：
2013-11-01
影响因子：
2.1
通讯作者：
Li, Rui
中科院分区：
文献类型：
--
作者：
Lin, Chuanlong;Liu, Jing;Li, Rui
本文用同步辐射X射线衍射和金刚石对顶砧拉曼散射研究了高压下六方晶系内标物RInO_3（R=Eu，Gd和Dy）的结构和振动性质。这三种六方结构在高压下表现出各向异性的压缩行为，并且在17 GPa以下是稳定的。高压拉曼光谱表明，大多数频率线性硬化与不同的速率在高压下。在类似于17 GPa的压力下，三种化合物经历了类似的相变。高压相的结构很难确定，这是由于在室温下相变的动力学阻碍导致的宽X射线衍射和拉曼谱图。(C)2013爱思唯尔有限公司保留所有权利。
The structural and vibrational properties of the hexagonal indates RInO3 (R=Eu, Gd and Dy) have been studied under high pressures using synchrotron x-ray diffraction and Raman scattering in diamond anvil cells. The three hexagonal structures exhibit anisotropic compression behaviors under high pressures and are stable up to similar to 17 GPa. High-pressure Raman spectra show that most frequencies harden linearly with different rates under high pressures. At similar to 17 GPa, three compounds undergo similar phase transitions. It is hard to indentify the structure of the high-pressure phase due to the broad x-ray diffraction and Raman patterns which could result from the kinetic hindrance of the phase transition at room temperature. (C) 2013 Elsevier Ltd. All rights reserved.